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BCD_Format

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BCD (Binary Coded Decimal) is a format for storing numbers, commonly used in some BIOS implementations.

BCD stores the 10-digit in the upper nibble and the 1-digit in the lower nibble - e.g. 12 decimal in BCD is 0x12 (=18).

C code for converting BCD to decimal and vice versa:

int bcd(int dec)
{
	return ((dec/10)<<4)+(dec%10);
}
int unbcd(int bcd)
{
	return ((bcd>>4)*10)+bcd%16;
}

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